| Index | St. Marys | Ontario | National |
| Median household income | $83,108 | $87,353 | $82,436 |
| Unemployment rate | 1.6% | 4.2% | 6.4% |
| In labour force | 63.9% | 61.7% | 63.9% |
| Labour Type | Percent |
| Construction industry | 4.1% |
| Manufacturing sector | 12.6% |
| Financial & insurance services | 2.4% |
| Wholesale & retail services | 12.8% |
| Public administration | 2.7% |
| Transportation, warehousing & utilities | 2.3% |
| Education, health & social services | 11.1% |
| Other | 15.3% |
| City | Population | Household Income | National Avg. |
| Perth South, ON | 4,205 | $112,765 | 36.8% |
| Zorra, ON | 8,659 | $101,966 | 23.7% |
| Lucan Biddulph, ON | 5,179 | $95,449 | 15.8% |
| West Perth, ON | 9,223 | $89,530 | 8.6% |
| Stratford, ON | 34,224 | $77,679 | 5.8% |
| St. Marys, ON | 8,093 | $83,108 | 0.8% |
| City | Population | Household Income | National Avg. |
| Floresville, TX | 8,092 | n/a | |
| Joshua, TX | 8,091 | n/a | |
| McGregor, FL | 8,095 | n/a | |
| Ashland, WI | 8,090 | n/a | |
| Marengo, IL | 8,096 | n/a | |
| St. Marys, ON | 8,093 | $83,108 | 0.8% |